TABLE 3.

Proportion of responses to previously tested short answer questions attributed to the experiment, to pre-experimental sources, or to no source, for correct answers and multiple-choice lure answers

	Correct answers		MC lure answers
	No feedback	Immediate feedback	No feedback	Immediate feedback
Experiment	.05 (.11)	.36 (.19)	.01 (.03)	.32 (.40)
Pre-experiment	.76 (.26)	.50 (.20)	.66 (.31)	.30 (.37)
Sourceless	.20 (.25)	.14 (.14)	.33 (.31)	.38 (.41)

Standard deviations are shown in parentheses.